Just wonder if it is possible to build a screen wall using P-Series and G-Series cards together from the same machine?

I personally own a Pharhelia (and a P650) AGP and a couple of G550 PCI-E and G450 PCI. If I can use P-Series and G-Series cards together then I will get a motherboard which has both AGP and PCI-E slots. Otherwise I will just give up the P-series cards and stick with PCI-E slots only.